/*
 * [New BSD License]
 * Copyright (c) 2011-2012, Brackit Project Team <info@brackit.org>  
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Brackit Project Team nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.brackit.xquery.node;

import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.util.HashMap;

import org.brackit.xquery.node.d2linked.D2NodeFactory;
import org.brackit.xquery.node.parser.DocumentParser;
import org.brackit.xquery.node.parser.SubtreeParser;
import org.brackit.xquery.util.io.URIHandler;
import org.brackit.xquery.xdm.Collection;
import org.brackit.xquery.xdm.DocumentException;
import org.brackit.xquery.xdm.Node;
import org.brackit.xquery.xdm.NodeFactory;
import org.brackit.xquery.xdm.OperationNotSupportedException;
import org.brackit.xquery.xdm.Store;
import org.brackit.xquery.xdm.Stream;

/**
 * 
 * @author Sebastian Baechle
 * 
 */
public class SimpleStore implements Store {
	private HashMap<String, Collection<?>> docs = new HashMap<String, Collection<?>>();

	@Override
	public Collection<?> create(String name) throws DocumentException {
		Collection<?> coll = getNodeFactory().collection(name);
		docs.put(name, coll);
		return coll;
	}

	@Override
	public Collection<?> create(String name, SubtreeParser parser)
			throws DocumentException {
		Collection<?> coll = getNodeFactory().collection(name, parser);
		docs.put(name, coll);
		return coll;
	}

	@Override
	public Collection<?> create(String name, Stream<SubtreeParser> parsers)
			throws DocumentException {
		Collection<?> coll = getNodeFactory().collection(name, parsers);
		docs.put(name, coll);
		return coll;
	}

	@Override
	public void drop(String name) throws DocumentException {
		if (docs.remove(name) == null) {
			throw new DocumentException("Collection %s not found", name);
		}
	}

	@Override
	public Collection<?> lookup(String name) throws DocumentException {
		Collection<?> coll = docs.get(name);
		if (coll != null) {
			return coll;
		}
		try {
			InputStream in = URIHandler.getInputStream(URI.create(name));
			DocumentParser p = new DocumentParser(in);
			Node<?> doc = getNodeFactory().build(p);
			coll = doc.getCollection();
			docs.put(name, coll);
			return coll;
		} catch (IOException e) {
			throw new DocumentException(e, "Collection %s not found", name);
		}
	}

	protected NodeFactory<?> getNodeFactory() {
		return new D2NodeFactory();
	}

	@Override
	public void makeDir(String path) throws DocumentException {
		throw new OperationNotSupportedException();
	}
}
